I'll try to make as precise as possible. Need thorough answers with references if possible.
Our neighbors just below our flat complained few days back about sewage water coming out of their kitchen outlet/pipe. They informed us to get it fixed. We got a little shocked as it was there problem not ours. But we did a favor and called a plumber to get it fixed with each family sharing the cost. The family got adamant on this issue (cost to be paid by us and not by them). We refused.
2 days went by.
Now they have completely blocked out sewage pipe and opened theirs. Unfortunately we're the only ones above them so its only we who are in deep problem. They ain't listening or anything and upon that dodging us.
What should be done?
The residence is located DHA khi